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  1. very low impedance white follower with 6H13C
  2. EL86 Any idea helps.
  3. 6112 and 6111 Mini-preamp
  4. Expert advice on what preamp to chose
  5. Harman Kardon DPR-7, Commander series pre/mixer
  6. input transformer - mumetal casing etc.
  7. Oil-filled caps: ASC versus Panasonic
  8. SOHA headphone amp
  9. Using a single triode as a .......
  10. Sonic Frontiers SFP-1 Phono Stage
  11. Help!! with attenuation.
  12. power up inrush current limiter - anyone using?
  13. Audioromy FU-29, Latest Model 828A Mini Review
  14. Vertical-deflection
  15. Drilling a hole
  16. Edcor CXPP25-MS-8K V Triode Z-565
  17. bad opt measured values
  18. Mu Follower Driver for Push-Pull
  19. Hickok 539 question...
  20. need datasheets for a phillips transformer if anyone has any
  21. Chicago power XFMR question.
  22. Coupling Capacitor - Pls Help
  23. Help please on Christmas gift
  24. Audio Note P-zero
  25. SE EL34 Schematic - What do you think?
  26. Playing with hybrid amp: SRPP + MOSFET
  27. 300B filament supply question
  28. KT88 Parallel Push Pull
  29. cheating life out of old tubes?
  30. dBu transformer ratings
  31. Dared MP-2a3c mods
  32. Output transformers (Wolpert)
  33. Using Mains Transformers as Outputs
  34. Tube just for show...
  35. first project - first post - poddwatt
  36. High power CCS
  37. Analog Summing
  38. My new el34 + 12ax7 VCT amp. (Need Ideas For my first headphone vacuum tube amp Too~)
  39. cascode tubes
  40. High Fidelity by Pilot (circa 1953)
  41. Hardware help please
  42. integrated amps 100 per channel
  43. KT88 mounting question
  44. Output Transformer question
  45. Angstrom Thermionic
  46. ECC88 tube buffer NEEDED !
  47. Marshall 8080, missing components
  48. Paralell SE 807 Amp design
  49. Putting together a tweaker friendly amplifier!
  50. Tube chassis
  51. DHT headphone Hybrid-CF+
  52. Looking for specs on this Beyer Xfmr
  53. Resistors for Berning EA-2101?
  54. Uneven Plate Glow
  55. Parafeed transformer sounds thin
  56. Lightbulbs as ccs
  57. My AWESOME First DIY amp
  58. Cary audio design SLI 80
  59. A1538 OPT?
  60. Genalex A2900 Keep or Sell?
  61. 6CB6 Spice Model wanted
  62. XFMR Help?
  63. 12 volt to 300 volt inverter question for tubes
  64. These amps should be verboten!
  65. how to use PCL86 instead of ecl86
  66. PSU for Aikido (4x 12SN7)
  67. SCA35 and AU-70
  68. Analisys of power amp limitations of tube bias range
  69. DIY Phono Preamp ??
  70. NOS 211 RCA or National Union?
  71. Iron Powder + Resin Output Transformer
  72. The Radio Hat Challenge
  73. EU regulations
  74. Transconductance for kt-90 in plain english
  75. Craftsmen RC-2
  76. Valve Amplification Company V100
  77. Parallel feed transformer with SRPP
  78. It's heeeeeere!- Valve Amplifiers 4th Edition
  79. opera consonance phonostage-PM1
  80. Anybody Explain this Preamp shematic?
  81. The high-voltage collection
  82. Input transformer topology question
  83. JE Labs 300Bdx stereo - troubleshooting
  84. battery operated 12/24/48 Volt multiple tube OTL
  85. Bringing up long-stored tube gear
  86. About RH84 three channel?
  87. MCC with Fisher
  88. Directly heated cathodes
  89. Build recommendation
  90. Ortofon KS 591 - informations
  91. Oatley K295-extra space for tubes
  92. A beginner's tube amp to drive a pair of fostex Fe103e
  93. Tame the beast.
  94. KT88 and Hammond Transformer
  95. B+ Drifts down after 2 hours
  96. Power amp sputters on turnoff
  97. Yet another EQP-1A
  98. How to bias 6SL7?
  99. 6CG7/6FQ7 = 6N5P (6Н5П)
  100. #27 mu stage
  101. Compactron Regulated Power Supply
  102. Best sounding voltage amplifier for hybride.
  103. PX25 to 300B pins
  104. de-gassing power tubes???
  105. Heathkit 51-29 output transformers issure
  106. 6AS7 Model
  107. 26H choke good enough for a grid or anode choke?
  108. Russian 6R2P for small amp.
  109. Power transformer primary is open.
  110. Rectifier oddness
  111. First Tube Build, Thoughts?
  112. Output Transformers
  113. Lazy Sunday 6SN7 Preamp
  114. Audio research VT200 Biasing & Schematic
  115. finished my new preamplifier!!
  116. What would be the correct output cap for this OTL Headphone Amp?
  117. Full Bridge Rectifier With Tubes
  118. Looking for data sheet for GE JAN 6146W/7212
  119. Best Valve pre-amp match for ME 550 amp
  120. Fisher 500c
  121. From old Philips tube books , just for tube audio DIY friends !
  122. UFO
  123. Adding a preamp?
  124. XS-225 valve amp circuit.
  125. LS7/CV1660 curves
  126. Differences between 12V6 tube and 12A6 tube?
  127. Please check my schematic
  128. 12W Push pull w/6C4C
  129. Tube Date Code
  130. For new members....
  131. Graphite ring on sweep tubes
  132. 6N6P tube - focus on
  133. Vox Guitar Amp Created a Revolution
  134. Hot tube preamp pedal build
  135. Counterpoint Electronics/Counterpoint Acoustics/Counterpoint Audio
  136. Radford STA100 improvements?
  137. Playmaster unit 2 help needed!
  138. help me build an output transformer
  139. Vintage Magnavox tube amp
  140. Christmas Build, advice needed.
  141. Speaker suggestions for ST-70
  142. Tube markings?
  143. gaumont-kalee
  144. amplifiers audio research D90
  145. 40W Glass A 300B tube schematic needed.
  146. Hum in one channel only
  147. Water cooling Power Tubes
  148. Toroid Output Transformer from Plitron
  149. Scott LK-30 Assembly Manual Needed
  150. HUM STARTS 1 OR 2 HOUR AFTER THE AMP IS ON
  151. The best valve amp!
  152. Equivalents for 12AT7 and 6N11 ? (Sense G3 headphone amp)
  153. More probably stupid questions about feedback
  154. single stage amp?
  155. SS 83 again
  156. Making Spice Models for tubes
  157. Seth mk 2 ???
  158. Colorful inspiration
  159. Testing KT-90's Ei NIs Yugoslavia
  160. El Cheapo Transformer Question
  161. Why does the grid extend so far beyond the anode ?
  162. Valve amplifier identification
  163. E-M-field problem
  164. Effective cathode resistance
  165. Spectrum evaluation ECC82
  166. power d90-b
  167. el34, kt88, kt90, 6550 to 8417 conversion
  168. Do you know these capacitors?
  169. Vintage Capacitor Identification??
  170. GRAAF GAAFiti WFB ONE - Schematic needed
  171. Oscillation WE417A
  172. EL84 fixed fixed bias
  173. Blown stereo
  174. 807/6au6 pure pentode mode amplifier
  175. help with ID'ing a tube
  176. Magnavox 50EH5 Stereo Amp
  177. My new Circlotron OTL tube power Amp.
  178. ideas for a tube eating guitair amp
  179. 6DE4, unused pins
  180. 300B what output transformer Sowter or Lundahl?
  181. 6DJ8 preamp w/balanced input - strange schematic
  182. Screen Grid Regulation Requirements
  183. Advice needed on new 6L6 ro 6V6 SE or SET build
  184. need a little help with an HK solo2 tube receiver
  185. Help me to build Vacuum Tube Amp.
  186. amp with SRPP output stage? post if you know one
  187. Output transformer question
  188. EF86 Phono pre-amp or Mcintosh MC2200?
  189. Transcendar is Branching Out
  190. can SE driven PP be clean enough to sound SE ?
  191. k12-m amp not working
  192. 813 amp and old choke
  193. Several hundred tubes found! What to do!
  194. Possible to convert Audiorom Fu29 to Single end?
  195. Measuring bias
  196. ecc802s SRPP preamplifier
  197. HELP! Capacitor specs for Sonic Frontiers SFC-1 Control Amplifier
  198. Class A KT88 info
  199. What is screen tap of transformer?
  200. Brightest heaters in tubes?
  201. 40% tap or not
  202. 6dj8 phono schematic needed
  203. EL34 Parts..
  204. solid state driven p-p ultralinear
  205. linestage w/separate PSU: where to "split" ?
  206. Anybody know this TELEFUNKEN SE transformer?
  207. Too much feedback?
  208. Tube Power Supply Dummy Load
  209. For 6c33 Fans. A new schematic
  210. WAD phono 3 motorboating with Raphaelite 300b
  211. Help! Tube Tester in Austin or Lago Vista?
  212. Vintage Stromberg Carlson
  213. GM70 and Other LTSpice Tube Models
  214. Please help me understand this feedback
  215. Affordable Valve Company - Re-bias
  216. The effect of different value coupling capacitors?
  217. Closed loop stability help needed.
  218. EAR 509 OPT Impedances
  219. Installing Hammond 1609s in K12-G
  220. 6088 Amplifier
  221. Valve Art kt88 not the same ring getter?
  222. 5mA DC transformer - tube output stage?
  223. Mini amp questions
  224. What mean those russian electronic units ?
  225. Coupling capacitors
  226. Monsters thread (high power tube amps)
  227. CCS on LTP please help
  228. Best type of pre-amp for valve/tube power amp
  229. 12au7 made by Toshiba, Hitachi, Matsushita, RSD, International and Miniwatt?
  230. Load lines
  231. Cold cathode tubes
  232. Redundant CNC stainless steel enclosures
  233. First try P-P 6S41S design
  234. Help!!! I need to get valve TAW12/20B / TRIODE for use as HF amplifier and oscillator
  235. Velleman K4040 Stereo Vacuum Tube Amplifier Volume Control
  236. 12AT7 Regulated Power Supply
  237. 2A3 to 45 Cathode Wattage?
  238. Cheap Chinese Ebay Amps
  239. Audion Sterling Integrated Amp Version - Stereo MK-I - Extended Live Time wanted
  240. Transformer Center Taps
  241. Output transformer for 18watt
  242. PTX temps
  243. Can A valve amplifier be both Class A and Class B?
  244. got a problem with my scope, need some advice
  245. DC coupled cathode follower driving me nuts
  246. Vacuum state gone?
  247. 1634 dual triode
  248. Aikido line amp
  249. Winding an ISO TX with pair of inductors
  250. Quad II Switch Mode PSU

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